package org.lkp.reggie.filter;

import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.lkp.reggie.response.BaseContext;
import org.lkp.reggie.response.R;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns ="/*" )
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest)servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;
        //1.获取本次请求的URI
        String requestURI = request.getRequestURI();
        log.info("拦截到请求：{}",requestURI);
        //定义不需要处理的请求路径
        String []urls=new String[]{
          "/employee/login",
          "/employee/logout",
          "/backend/**",
          "/front/**",
          "/common/**",
          "/user/sendMsg",
          "/user/login",
        };
        //2.判断本次请求是否需要处理
        boolean check = check(urls, requestURI);
        //3.如果不需要处理，则直接放行
        log.info("本次请求{}不需要处理",requestURI);
        if(check){
            filterChain.doFilter(request,response);
            return;
        }
        //4-1.判断登录状态，如果已经登录则直接放行
       if (request.getSession().getAttribute("employee")!=null){
           log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("employee"));
           long id = Thread.currentThread().getId();
           log.info("线程id为：{}",id);
           Long empId=(Long)request.getSession().getAttribute("employee");
           BaseContext.setCurrentId(empId);
           filterChain.doFilter(request,response);
           return;
       }
        //4-2.判断移动端登录状态，如果已经登录则直接放行
        if (request.getSession().getAttribute("user")!=null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("user"));
            long id = Thread.currentThread().getId();
            log.info("线程id为：{}",id);
            Long empId=(Long)request.getSession().getAttribute("user");
            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return;
        }

       log.info("用户未登录");
       //5.如果未登录则返回未登录结果，通过输出流方式向客户端页面响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
       return;
    }
    public boolean check(String []urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }
}
